Plagiarize 4/12/12

Question 1: what did the student do wrong? what could he/she have done to include the source correctly?
   The student used parts of the original text in his own post without citing the source. he/she could have put the website where he/she got it, then put parentheses with the line where he/she got it. ex. (10).
Question 2: In Vincent Van Gogh: Starry Night by an unknown author, he/she expresses what everyone sees when they first view the painting. "there is the night sky filled with swirling clouds, stars ablaze in their own luminescence, and a bright cresent moon (18-20)
Question 3: 3 ways to avoid plagiarizing: read, then write based on what you remember. Always cite the source. Remember to include quotations.